<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>图片切换</title>
</head>
<body>
    <div id="mask">
        <div class="center">
            <!-- <h2 class="title">
                <img src="./res/2.jpg" alt="">
            </h2> -->
            <img :src="imgArr[index]" alt="" />
            <!-- <a href="javascript:void(0)" v-show="index!=0" @click="prev" class="left">
                <img src="./res/pre.jpg" alt="">
            </a> -->
            <!-- 或使用v-if 都可以实现-->
            <a href="javascript:void(0)" v-if="index!=0" @click="prev" class="left">
                <img src="./res/pre.jpg" alt="">
            </a>
            <a href="javascript:void(0)" v-show="index < imgArr.length-1" @click="next" class="right">
                <img src="./res/next.jpg" alt="">
            </a>
        </div>

    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el:"#mask",
            data:{
                imgArr:[
                "./res/2.jpg",
                "./res/3.jpg",
                "./res/4.jpg",
                "./res/5.jpg"
                ],
                index: 0
            },
            methods: {
                prev:function(){
                    this.index--;
                },
                next:function(){
                    this.index++;
                }
            }
        })
    </script>
</body>
</html>